[horde] CalDAV/CardDAV synchronization

[Benedikt Bäumle]

  Dear Horde-Team,

  we have troubles using the CardDAV implementations.

  We are not able to sync with the Apple Address Book app ( currently  
tested on mac OS Sierra ( 10.12.2 ) with Address Book App Version 10.0  
).

  From your wiki site I could find the information that it should work  
with the principles URL:

  https://host.de/rpc.php/principals/user

  I was able to connect an account with this URL, but the contacts did  
not show up. Also by using the URL for the address book itself:

https://host.de/rpc.php/addressbooks/user/contacts-aksjklasjdkljaskldjklasjdkljalk/

  Both did not give me an error but were syncing nothing.

The logs say the following:
  0.0.0.0 - - [23/May/2017:12:43:35 +0200] "PROPFIND  
/rpc.php/addressbooks/user/contacts~asndjKJASKJJKFJKASB HTTP/1.1" 401  
4185 "-" "Mac OS X/10.12.2 (16C67) AddressBook/1756.14.6"
  0.0.0.0 - user [23/May/2017:12:43:35 +0200] "PROPFIND  
/rpc.php/addressbooks/user/contacts~asndjKJASKJJKFJKASB HTTP/1.1" 207  
1804 "-" "Mac OS X/10.12.2 (16C67) AddressBook/1756.14.6"
  0.0.0.0 - - [23/May/2017:12:43:35 +0200] "OPTIONS  
/rpc.php/principals/user/ HTTP/1.1" 401 1165 "-" "Mac OS X/10.12.2  
(16C67) AddressBook/1756.14.6"
  0.0.0.0 - user [23/May/2017:12:43:35 +0200] "OPTIONS  
/rpc.php/principals/user/ HTTP/1.1" 200 1531 "-" "Mac OS X/10.12.2  
(16C67) AddressBook/1756.14.6"
   

  In our apache config file we also added the redirect for  
autodiscovery which does not change anything:

  RedirectPermanent /.well-known/carddav /rpc.php

  If I take a look into the web interface  
under https://host.de/rpc.php/principals/baeumle I just find an empty  
directory. Is it supposed to be empty?

  Did we miss something?

  If you need additional information please let me know. Thank you a  
lot in advance!

  Greetings,

  Benedikt